Have fallen within a year at New Orleans, but in this locality the average for a year is about 57.6 in.; at Shreveport the average is 46 in., and for the entire state it is 55 in.

The Union gunboats, which had passed up the river toward Shreveport at high water, were caught in its decline above the falls at Alexandria, but they were saved by a splendid piece of engineering (a dam at the falls), constructed by Lieutenant-Colonel Joseph Bailey (1827-1867), who for this service received the thanks of Congress and the brevet of brigadier-general of volunteers.